Dates not available, but clients can still book

Hello,

Both in my Calendly app and on the desktop, it shows that I am unavailable from August 1st through August 25th. I set this up weeks ago. However, today a client managed to book an initial phone consultation for tomorrow (I work as a psychotherapist). The client is not at fault, but this is very frustrating for me because I was hoping to take a few days off during my vacation.

All the unavailable days are correctly highlighted in blue. What could be causing this issue? Could it be a bug? I would greatly appreciate any advice.

Best regards,

Sabine.